onlyinajeep726 Posted April 28, 2014 Share Posted April 28, 2014 So, in switching heads, I no longer have a place to put the temperature gauge sending unit. Was wondering if this was an acceptable way to correct this problem. My biggest concern is air pockets throwing off the readings. Anyone have some insight? Link to comment Share on other sites More sharing options...
benjy_26 Posted April 28, 2014 Share Posted April 28, 2014 It *should* be ok, assuming your system is properly bled. BTW, is that a pair of Kleins I see? Link to comment Share on other sites More sharing options...
yellaheep Posted April 28, 2014 Share Posted April 28, 2014 Problem with that setup is the coolant isn't flowing past the sensors. The temps will be a bit on the ambient side.... More reflecting the temp of the brass and heat of the coolant sitting in the small area in the brass block. Link to comment Share on other sites More sharing options...
ftpiercecracker1 Posted April 28, 2014 Share Posted April 28, 2014 I know its to late now, but next time you are doing a head swap look a little closer. There are 7120 cast heads with the port still in place, i know because i have one, although i can't remember what year jeep mine came off of. Link to comment Share on other sites More sharing options...
FrankTheDog Posted April 28, 2014 Share Posted April 28, 2014 The 97 and up heads usually don't have the port on the back drivers side of the head but the boss is there and you can drill it out for 1/8 NPT. Some early 97's still had the port. Link to comment Share on other sites More sharing options...
Blue XJ Posted April 28, 2014 Share Posted April 28, 2014 I know its to late now, but next time you are doing a head swap look a little closer. There are 7120 cast heads with the port still in place, i know because i have one, although i can't remember what year jeep mine came off of. My 95 still had the threaded hole for it. I ended up going with the newer thermostat housing that has the sendor port built in. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted April 28, 2014 Author Share Posted April 28, 2014 Yea, it's a later 0630 head. Previously it had an earlier 0630 head (think it was from a '96) that was drilled and tapped, but with a plug in it. I have a spare 4.0 that also has the 0630 head and it's a '98 engine, no hole. Benjy, I think that's it's a pair of Kleins but I'm not for sure. I found them a long while ago at a junkyard and I've just held onto them. Yellaheep, I was worried about the exact thing you said here. I don't see how the fluid will really flow past the probe ends. I need to rethink this somehow. I wonder, could I relocate one of these two senders into the side of the block, where the drain plug is, or would that not give me a correct reading for the gauge and/or fan switch? Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 28, 2014 Share Posted April 28, 2014 Drill and tap the round spot below the right housing bolt for the small sensor. It will work Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted April 28, 2014 Author Share Posted April 28, 2014 Drill and tap the round spot below the right housing bolt for the small sensor. It will work Like so? :yes: Thanks for the idea Pat, fits perfectly and it seems it should read accurately. Brilliant! :rock on: Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 28, 2014 Share Posted April 28, 2014 Problem solved Link to comment Share on other sites More sharing options...
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